IT Infrastructure Engineer III / Senior

Eetdbuyersguide; Phoenix (AZ); On-site; USD 90,000 - 130,000; Full time

Job summary

APS is seeking an IT Infrastructure Engineer III/Senior to support SCADA and related IT infrastructure for renewable and fossil generation facilities in Arizona. You will troubleshoot with generation teams, travel to sites, and participate in a 24/7 on-call support model to ensure reliable, secure systems powering energy generation daily.

The role requires a bachelor’s degree in IT or related field and 5–7 years of experience, with strong knowledge across compute, storage, networking, and

Qualifications

• Experience in IT infra or industrial environments.
• Familiarity with SCADA/OT environments preferred.
• Willingness to travel to generation sites and offices.

Responsibilities

• Maintain SCADA and related infrastructure for reliable operation.
• Collaborate with generation teams to troubleshoot and improve performance.
• Provide hands-on IT support at generation sites and offices.
• Participate in 24/7 on-call rotation for mission-critical apps.

Skills

SCADA systems

OT environments

IT infrastructure

Travel willingness

Team collaboration

Education

Bachelor's degree in Information Technology

Tools

Windows Server

Linux servers

Active Directory

Network monitoring

Job description

IT Infrastructure Engineer III / Senior

At APS, this role helps keep Arizona's energy flowing by ensuring the technology behind our non-nuclear generation fleet is reliable, secure, and ready for the future. As an IT Infrastructure Engineer III or Senior, you'll support the systems that power renewable and fossil generation facilities, making sure operators have dependable tools to safely generate electricity every day. Your work directly supports APS's mission to deliver safe, reliable energy to the communities we serve across Arizona.

What Your Day Would Be Like

• Support and maintain SCADA and related infrastructure that enables renewable and fossil generation facilities to operate reliably
• Partner with generation teams to troubleshoot issues, support applications, and improve system performance
• Travel to generation sites to provide hands‑on support and represent the IT team as a trusted technical partner
• Work on infrastructure projects that strengthen security, reliability, and future readiness of generation systems
• Participate in a 24×7×365 rotational support model to help ensure continuous operations (standard schedule M‑F, 8-5)

Who We're Looking For

• Experience supporting IT infrastructure and applications in an operational or industrial environment
• Knowledge of renewable generation systems (primary) and fossil generation systems (secondary)
• Background working with SCADA or similar operational technology environments
• Willingness and ability to travel to generation sites and serve as the “face” of the IT team
• A collaborative, service-oriented mindset with a focus on reliability, safety, and customer support

Minimum Requirements

IT Infrastructure Engineer III

• Bachelor’s degree in Information Technology or related field
• PLUS five (5) years of prior relevant experience or equivalent combination of education and directly related experience
• Requires strong technical knowledge within a job area or system and basic knowledge across related technical areas

IT Infrastructure Engineer Senior

• Bachelor’s degree in Information Technology or related field
• PLUS seven (7) years of prior relevant experience or equivalent combination of education and directly related experience
• Requires in-depth level of technical knowledge within a job area and working knowledge of other technical areas

Preferred Special Skills, Knowledge or Qualifications

• Proficient in maintaining/troubleshooting SCADA human‑to‑machine interface (HMI) platforms with associated applications within renewable and fossil generation environments
• Troubleshooting; installing and repairing PC hardware and software; advanced design, maintenance, and repair of servers; applying creative solutions to business problems to ensure business needs are most effectively met; advanced information system configuration management
• Knowledge of all infrastructure technologies (compute, storage, networking, physical infrastructure, software, commercial off the shelf (COTS) and open source packages and solutions, virtual and cloud including IaaS, PaaS and SaaS); infrastructure management tools and monitoring tools; solution sizing for hardware/software platforms; industry standard security requirements and designs
• Knowledge of renewable and fossil generation plant equipment, including inverters, controllers, and tracking systems
• Skilled in configuring and supporting industrial control‑system communications using SEL, Modbus, DNP3, OPC and other protocols
• Experience supporting battery management systems, including troubleshooting issues and interfacing with vendors
• Experience providing network support, including troubleshooting, configuration, and performance monitoring
• Proficient in server administration across virtualized and physical environments for both Windows and Linux systems. This includes assisting with the design of systems and ensuring architecture standards are met
• Hands‑on experience managing and supporting Active Directory, including user/group administration and policy management
• Ability to travel to generation facilities and corporate offices as needed to support operational and project activities
• Ability to develop and write technical documentation; evaluate and test emerging technologies

Major Accountabilities

1. Under general direction, build and maintain fossil and renewable generation human‑to‑machine interface (HMI) systems within a process control environment
2. Drive restoration of HMI/SCADA systems impacting generation operations
3. Execute HMI lifecycle replacement and upgrade projects across the generation fleet
4. Interface with vendors for support and engineering of systems during projects and upgrades
5. Troubleshoot industrial communication protocols to ensure data flow within engineering and operating systems
6. Support Linux and other non‑Windows devices within an energy management system (EMS) at renewable generation facilities
7. Provide higher level support to help desk personnel or other engineers/analysts with less experience
8. Participate in a rotating 24/7 on‑call support schedule for mission‑critical applications
9. May manage projects at this level, requiring responsibility for the delegation of work and the review of others’ work products and engineering projects
10. Participate in business requirements meetings
11. Partner with technical architects to translate the architectural designs into operations
12. Serve as primary on‑site IT/OT representative for generation facilities
13. Act as primary coordination point between Generation IT, Network Engineering, Cybersecurity, and plant operations